E-Fuel Process Integration Patents: Leaders & White Space 2026
- 6.3% concentration at the top. the five most active assignees together hold only 7,740 of 122,195 records in scope, so no single filer controls the field.
- Filings cooled after a 2021 peak. 898 records that year fell to 564 by 2024, a -37% swing, though 2025-26 counts are still filling in as publications lag filing.
- Composition splits across power and process hardware. digital control (G06F), inorganic feedstock chemistry (C01B) and thermal/turbine plant classes (F01K, F02C) each hold roughly 1-2% of records, with no single class dominant.
Filing growth compares 2021 (898 records) with 2024 (564) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 122,195 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
E-fuel process integration and flexibility sits at the junction of power generation, electrolysis and downstream synthesis — the plumbing that decides whether a plant can absorb variable renewable input, buffer intermediate streams like hydrogen or syngas, and still deliver a consistent fuel output. Filings in this space span carbon source selection, buffer storage sizing and control, and the chain efficiency claims that tie electrolyzer, synthesis reactor and grid interface together. The representative record in this dataset, a nuclear-powered hydrocarbon synthesis system, illustrates the pattern: claims rarely sit inside one discipline, they bridge power supply, storage buffering and chemical synthesis in a single specification.
That cross-disciplinary shape explains why the technology composition below spreads across digital control, inorganic chemistry, batteries, thermal plant and grid classes rather than clustering in one IPC subclass. It also means competitive risk is not confined to chemical-process filers — power electronics and grid-control assignees show up in the same search scope.
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Filing trend and technology composition
Two views of the same 122,195-record dataset: how filing activity has moved year over year, and which IPC subclasses carry the claim density today.
A 2021 peak, then a pullback that predates the publication lag
Annual filings rose from 733 in 2017 to a peak of 898 in 2021, then declined to 564 by 2024 — a -37% move over that three-year span. Counts for 2025 and 2026 are still incomplete because publication typically lags filing by around 18 months, so the true trajectory of the most recent years will only be visible in later data pulls.
No single class dominates
The leading subclass, G06F (electric digital data processing), covers just 1.7% of the 122,195 records in scope, with C01B (non-metallic elements and inorganic compounds) close behind at the same share. H01M, H01L, F01K, H02J, F02C and H04B each sit near or just above 1%. Because records can carry multiple IPC codes, these shares sum to more than 100% — the takeaway is breadth, not a single crowded core.
Shares are the percentage of the 122,195 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on E-Fuel Process Integration and Flexibility with Eureka
This page is one run against one query. Ask Eureka your own question about e-fuel process integration and flexibility and every answer comes back with the patent numbers behind it.
Try EurekaA representative filing and the most-cited prior art
US20100177861A1 — System and process for producing hydrocarbon fuel from a carbonaceous material (AREVA, 2010)
The filing describes a nuclear power plant supplying electricity to both a power distribution grid and a hydrocarbon fuel manufacturing plant. The manufacturing plant runs an electrolyzer that converts water and nuclear-sourced power into a hydrogen stream, feeds a hydrocarbon fuel synthesis unit, and holds output in a buffer storage of the given hydrocarbon fuel.This is the pattern this dataset's search terms were built around: a dedicated power source, an electrolysis step, a synthesis unit, and a buffer store tying them together.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6139546A | Linear power control with digital phase lock | 1,610 |
| 2 | US5632957A | Molecular biological diagnostic systems including electrodes | 1,470 |
| 3 | US20190201046A1 | Method for controlling smart energy devices | 1,444 |
| 4 | US20190201047A1 | Method for smart energy device infrastructure | 1,268 |
| 5 | US5589136A | Silicon-based sleeve devices for chemical reactions | 977 |
| 6 | US5748103A | Two-way TDMA telemetry system with power conservation features | 866 |
| 7 | US7418392B1 | System and method for controlling the operation of a device by voice commands | 780 |
| 8 | US6539336B1 | Sport monitoring system for determining airtime, speed, power absorbed and other factors such as drop distance | 762 |
| 9 | US20140270229A1 | Method and system for power delivery to a headset | 713 |
| 10 | US5455888A | Speech bandwidth extension method and apparatus | 713 |
Citation counts inside a searched corpus favour older filings that have had more time to accumulate citations — treat this table as a signal of influence on the field, not a ranking of current technical importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the filing pattern signals
Three readings of the data that matter more for planning than the raw counts alone.
No single filer controls the field
The five most active assignees combined hold 7,740 records, just 6.3% of all 122,195 in scope. Extending to ten assignees only reaches 9.6% (11,727 records). That is a shallow concentration curve for a 100-company ranking — competitive exposure here comes from breadth of activity, not a dominant incumbent to design around.
A post-peak pullback, not a collapse
Filing activity peaked in 2021 at 898 records and had fallen to 564 by 2024. That is a genuine three-year decline, but 2025 and 2026 figures are still incomplete given the roughly 18-month lag between filing and publication, so it is premature to call this a sustained downturn.
Filing activity is US-anchored with a thin PCT layer
The United States receives more than double the filings of the next office (EPO, 3,981), with WIPO/PCT filings at 2,263 suggesting only a portion of applicants pursue broad multi-jurisdiction protection. Canada, Australia and the UK each sit under 1,150 filings.
Claims sit across power, chemistry and digital control
The leading IPC subclasses each capture only 1-2% of the 122,195 records, spanning digital data processing, inorganic chemistry, batteries, semiconductors, thermal plant, grid systems and gas turbines. That spread confirms this is a systems-integration field rather than a single-discipline one.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to e-fuel process integration and flexibility, with the prior art for and against each one.
Who is filing, and where activity is thinning
The ranked leaders span power electronics, semiconductor and industrial-materials firms rather than a cluster of pure e-fuel specialists, reflecting how broadly the search terms cut across power supply, storage and synthesis claims.
A wide gap over the field, but not a lock
The top-ranked assignee holds 3,056 records, well ahead of fifth place at 959 and tenth at 654. That gap says the leader has been active longest or broadest across the search scope, not that later entrants face a blocked field — the top-10 share is still under 10% of all records.
Co-assignee filing is rare and concentrated
Only 10 co-assignee pairs appear across this dataset. The strongest single pair co-files 74 records together, far ahead of the next pairs at 25 and 9 — most activity here is filed by a single named assignee rather than through joint ventures or shared R&D structures.
Recent-year activity is thin across the board
Latest-year counts for individually tracked assignees are small — several show 0 or 1 record in the most recent year, with year-over-year swings like -83% and -100% that reflect low absolute volumes rather than a broad exit from the field. Read single-digit latest-year counts as noise, not strategy signals.
| Assignee | Recent year | YoY |
|---|---|---|
| Apple Inc. | 1 | -83% |
| International Business Machines Corporation (IBM) | 1 | -50% |
| Toshiba Corporation | 1 | — |
| Semiconductor Energy Laboratory Co., Ltd. | 0 | -100% |
| Mitsubishi Materials Corporation | 0 | — |
| Eight Rivers Capital, LLC | 0 | -100% |
| Advanced Micro Devices, Inc. (AMD) | 0 | — |
| Air Products and Chemicals, Inc. | 0 | -100% |
Where to take this analysis
The dataset points to a field with room to file, but the openings are in integration logic rather than in any single unclaimed chemistry.
Pressure-test a buffer-storage or carbon-switching claim
Run a freedom-to-operate check against the assignees active in the buffer storage and carbon source selection language before drafting, since these terms sit inside a broader search scope shared with power and grid filers.
Explore claim scope in Eureka →Track the post-2021 filing pullback into 2025-26
Because publication lags filing by roughly 18 months, the real trajectory since the 2021 peak will only become clear in the next one to two data refreshes — set a watch on this topic rather than concluding the field is shrinking.
Set up monitoring in Eureka →Map the thin co-assignee network
With only 10 co-assignee pairs identified and one pair far outweighing the rest, joint-filing structures are not yet a common strategy here — worth confirming before assuming a partnership route is well-trodden.
View assignee network in Eureka →Common questions on this landscape
The assignee ranking for this dataset covers 100 companies, and the top filer holds 3,056 records against 959 for fifth place and 654 for tenth. Even so, the top 5 assignees combined account for only 6.3% of all 122,195 records in scope, and the top 10 reach just 9.6%. That is a shallow concentration curve: the field has an identifiable leader but no assignee close to controlling the claim space, so competitive risk is spread across many mid-size filers rather than concentrated in one incumbent.
Filings rose from 733 in 2017 to a peak of 898 in 2021, then fell to 564 by 2024, a -37% decline over that three-year window. That is a real, complete-year trend and should be treated as such. However, counts for 2025 and 2026 are still incomplete because publication typically lags filing by around 18 months, so it would be inaccurate to describe the field as currently declining based on the newest years alone — those numbers will keep rising as more records publish.
The technology composition spans digital data processing (G06F), inorganic chemical feedstock (C01B), batteries and fuel cells (H01M), semiconductor devices (H01L), thermal and steam power plant (F01K), power supply and grid systems (H02J), gas-turbine plant (F02C) and transmission systems (H04B). Each of these leading IPC subclasses covers only about 1-2% of the 122,195 records in scope, and because a single record can carry multiple classes, the shares add up to more than 100%. The practical reading is that claims in this space are drafted across power, chemistry and control disciplines rather than concentrated in one technical core.
The IPC spread shows no subclass above roughly 1.7% of records, which points to breadth rather than a single crowded bottleneck, and the co-assignee data shows only 10 identified filing partnerships in total, suggesting joint-development claim strategies are underused. Specific areas worth checking include dynamic buffer-storage sizing logic, carbon-source switching between biogenic and captured feedstocks, and purity control across multi-feedstock synthesis trains. Any of these should still be checked against the individual assignees active in adjacent classes before drafting, since the field's low concentration does not mean any particular sub-area is clear.
The representative record in this dataset, US20100177861A1 from AREVA, claims a system linking a nuclear power plant, an electrolyzer producing hydrogen from that power, a hydrocarbon fuel synthesis unit, and a buffer storage step for the resulting fuel, with the power plant also supplying a shared distribution grid. That structure — dedicated power source, electrolysis, synthesis, and buffering, tied together as one claimed system — is representative of how this dataset's search terms were constructed, and similar multi-stage system claims recur across the corpus rather than being unique to this one filing.
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Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.